<template>
  <div ref='dom' class='charts chart-pie'></div>
</template>

<script>
  import echarts from 'echarts'
  import tdTheme from './theme.json'

  echarts.registerTheme('tdTheme', tdTheme)
  export default {
    name: 'ChartPie',
    props: {
      value: Array,
      text: String,
      subtext: String
    },
    mounted () {
      this.$nextTick(() => {
        let legend = this.value.map(_ => _.name)
        let option = {
          title: {
            text: this.text,
            subtext: this.subtext,
            x: 'center'
          },
          tooltip: {
            trigger: 'item',
            formatter: '{a} <br/>{b} : {c} ({d}%)'
          },
          legend: {
            orient: 'vertical',
            left: 'left',
            data: legend
          },
          series: [
            {
              type: 'pie',
              radius: '55%',
              center: ['50%', '60%'],
              data: this.value,
              itemStyle: {
                emphasis: {
                  shadowBlur: 10,
                  shadowOffsetX: 0,
                  shadowColor: 'rgba(0, 0, 0, 0.5)'
                }
              }
            }
          ]
        }
        let dom = echarts.init(this.$refs.dom, 'tdTheme')
        dom.setOption(option)
      })
    },

    watch: {
      value (value) {
        let legend = value.map(_ => _.name)
        let option = {
          title: {
            text: this.text,
            subtext: this.subtext,
            x: 'center'
          },
          tooltip: {
            trigger: 'item',
            formatter: '{a} <br/>{b} : {c} ({d}%)'
          },
          legend: {
            orient: 'vertical',
            left: 'left',
            data: legend
          },
          series: [
            {
              type: 'pie',
              radius: '55%',
              center: ['50%', '60%'],
              data: this.value,
              itemStyle: {
                emphasis: {
                  shadowBlur: 10,
                  shadowOffsetX: 0,
                  shadowColor: 'rgba(0, 0, 0, 0.5)'
                }
              }
            }
          ]
        }
        let dom = echarts.init(this.$refs.dom, 'tdTheme')
        dom.setOption(option)
      }
    }
  }
</script>

<style lang='less'>
  .charts {
    //
  }
</style>
